Hello, the 20-year-old area is not visible in the photos you have uploaded. If you upload the photo so that all wisdom teeth can be seen with a current photo, I can make a more detailed evaluation on the subject.
It is usually not possible to reimplant a wisdom tooth instead of the tooth to be extracted. In addition to the extraction of your wisdom teeth, dental implant application will be the most successful treatment instead of the work you have lost.
Sadly removal of your wisdom teeth will not incur in any facial slimming effects whatsoever. Additional procedures might need to be performed for those results